Developer Tools & Calculators
Developer tools for SQL, JSON, CSV, APIs, timestamps, networking, hashing, regex, cloud cost and backend workflow calculations.
Browse developer tools388 resources in this topic. Start with the featured tools below, browse the paginated directory, or use PROFENG search when you already know the calculation, conversion, comparison or workflow you need.
All developer resources
Showing 1–60 of 388 resources.
Base64 Encoder / Decoder
Encode Unicode text to Base64 or decode Base64, including URL-safe Base64.
UUID Generator
Generate one or many cryptographically secure UUID v4 identifiers in your browser.
Timestamp Converter
Convert Unix timestamps to readable local and ISO dates, or convert dates back to Unix time.
CSV to SQL IN Array Formatter
Convert comma-separated or newline-separated values into a safely quoted SQL IN-list format for query building and debugging.
JSON to CSV Converter
Convert a JSON array of flat objects into CSV with automatically generated headers and properly escaped fields.
Cloud Compute Monthly Cost Calculator
Estimate monthly virtual-machine compute cost from hourly instance rate, instance count, hours and utilization.
CSV to SQL INSERT Generator
Convert CSV rows with headers into SQL INSERT statements for a selected table, with basic escaping for text values.
JSON to SQL INSERT Generator
Convert a JSON object or array of objects into SQL INSERT statements with inferred columns and escaped scalar values.
CSV to JSON Converter
Convert CSV data with a header row into a JSON array of objects for APIs, scripts, imports and testing.
JSON Flattener
Flatten nested JSON objects and arrays into dot-path keys for analytics, debugging, exports and tabular processing.
JSON to TypeScript Interface Generator
Generate a TypeScript interface shape from sample JSON data, inferring primitive types, arrays and nested objects.
SQL IN Clause Formatter
Format a messy list of IDs or text values into a clean SQL IN clause with optional quoting, deduplication and sorting.
API Query String Builder
Build URL query strings from key-value pairs with correct percent encoding, repeated parameters and a live generated URL.
URL Query String Parser
Parse a URL or raw query string into decoded key-value pairs, including repeated parameter names.
JWT Decoder
Decode JWT header and payload sections locally without verifying the signature, useful for inspecting token claims during development.
Epoch Timestamp Batch Converter
Convert multiple Unix epoch timestamps in seconds or milliseconds into ISO 8601 and local date-time values in one batch.
ISO 8601 Duration Converter
Convert ISO 8601 duration strings such as PT2H30M into component values and approximate total seconds or minutes.
IPv4 Subnet Calculator
Calculate network address, broadcast address, usable host range, subnet mask and host capacity from IPv4 CIDR notation.
CIDR Range Calculator
Convert IPv4 CIDR notation into first address, last address, address count and dotted-decimal subnet mask.
HTTP Status Code Lookup
Look up common HTTP status codes by number or keyword and see their standard meaning and typical debugging context.
Regex Tester
Test a JavaScript regular expression against sample text with flags, match highlighting and captured-group output.
HTML Entity Encoder / Decoder
Encode special characters into HTML entities or decode HTML entities back to plain text for templates, CMS content and debugging.
Unicode Escape Converter
Convert text to JavaScript-style Unicode escape sequences and decode \uXXXX sequences back into readable text.
JSON Minifier & Validator
Validate JSON syntax and minify valid JSON into a compact single-line representation for APIs, payloads and storage.
JSON Pretty Printer
Validate and format JSON with readable indentation for API responses, configuration files, logs and debugging.
XML Escape / Unescape Tool
Escape XML special characters or decode XML entities for configuration, integration messages and data transformation workflows.
SQL Identifier Quote Converter
Quote column and table identifiers for PostgreSQL, MySQL or SQL Server syntax and optionally process comma-separated names in bulk.
Cloud Storage Cost Calculator
Estimate monthly object or block storage cost from stored gigabytes, storage price, requests and retrieval charges.
Cloud Data Egress Cost Calculator
Estimate monthly network egress cost from outbound data volume, free allowance and per-GB transfer price.
Serverless Function Cost Calculator
Estimate serverless compute cost from invocations, duration, allocated memory and editable request and compute pricing.
Kubernetes Cluster Cost Calculator
Estimate monthly Kubernetes infrastructure cost from worker nodes, hourly node rate, control-plane cost and storage.
Managed Database Cost Estimator
Estimate monthly managed database cost from compute hours, storage, IOPS or request charges and backup storage.
Log Ingestion Cost Calculator
Estimate observability or SIEM log cost from daily ingestion, retention, indexing and archive price assumptions.
AI API Token Cost Calculator
Estimate AI API cost from input and output token volume using editable per-million-token prices.
API Request Cost Calculator
Estimate API usage cost from monthly request volume, free tier and price per thousand or million requests.
Webhook Retry Backoff Calculator
Generate exponential retry delays and cumulative retry time from initial delay, multiplier, maximum delay and attempt count.
Cron Expression Builder
Build a standard five-field cron expression from minute, hour, day-of-month, month and weekday inputs with a readable preview.
SQL Date Range Generator
Generate SQL date-range predicates for PostgreSQL, MySQL or SQL Server from start date, end date and column name.
Reserved Instance Break-Even Calculator
Estimate monthly savings, upfront-fee break-even and first-year savings for a reserved compute commitment versus on-demand pricing.
Cloud Savings Plan Break-Even Calculator
Compare on-demand and committed cloud compute rates to estimate monthly savings and commitment break-even.
Data Warehouse Query Cost Calculator
Estimate data-warehouse query cost from billable usage units, unit price and fixed monthly platform fees.
CDN Bandwidth Cost Calculator
Estimate CDN delivery cost from outbound bandwidth, price per GB and fixed monthly fees.
AWS Savings Plans vs Reserved Instances Comparison Guide
A commercial comparison guide for AWS savings plans vs reserved instances, covering commitment flexibility, eligible compute scope, payment option.
Cloud Egress Cost Reduction Checklist
A due-diligence checklist for cloud egress cost reduction, covering traffic destination, CDN and caching, cross-region architecture.
Managed Database High Availability Cost Checklist
A due-diligence checklist for managed database high availability cost, covering replica topology, backup and storage, cross-zone traffic.
Managed Kubernetes TCO Decision Guide
A practical decision guide for managed kubernetes tco, covering worker-node cost, control-plane fees, operations and observability.
Observability Vendor Pricing Comparison Guide
A commercial comparison guide for observability vendor pricing, covering log ingest, metric cardinality, retention and query charges.
Data Warehouse Compute Credit Cost Decision Guide
A practical decision guide for data warehouse compute credit cost, covering warehouse sizing, auto-suspend behavior, concurrency.
API Gateway Pricing Comparison Guide
A commercial comparison guide for API gateway pricing, covering request tiers, data transfer, authentication add-ons.
Serverless Cost and Latency Trade-Off Decision Guide
A practical decision guide for serverless cost and latency trade-off, covering memory allocation, execution duration, cold-start behavior.
Multi-Region Cloud Architecture Cost Checklist
A due-diligence checklist for multi-region cloud architecture cost, covering duplicate compute, data replication, inter-region transfer.
Cloud Backup Retention Pricing Checklist
A due-diligence checklist for cloud backup retention pricing, covering retention tiers, restore fees, cross-region copies.
Cloud Compute Monthly Cost Scenario Calculator
Estimate cloud compute monthly cost with editable commercial assumptions and a transparent browser-based calculation.
Serverless Invocation Cost Scenario Calculator
Estimate serverless invocation cost with editable commercial assumptions and a transparent browser-based calculation.
Managed Database Monthly Cost Scenario Calculator
Estimate managed database monthly cost with editable commercial assumptions and a transparent browser-based calculation.
Cloud Egress Cost Scenario Calculator
Estimate cloud egress cost with editable commercial assumptions and a transparent browser-based calculation.
Object Storage Monthly Cost Scenario Calculator
Estimate object storage monthly cost with editable commercial assumptions and a transparent browser-based calculation.
Log Ingestion and Retention Cost Scenario Calculator
Estimate log ingestion and retention cost with editable commercial assumptions and a transparent browser-based calculation.
Observability Platform TCO Scenario Calculator
Estimate observability platform tco with editable commercial assumptions and a transparent browser-based calculation.
CDN Delivery Cost Scenario Calculator
Estimate cdn delivery cost with editable commercial assumptions and a transparent browser-based calculation.
Need a different type of tool?
Return to PROFENG search to find a specific resource across all 5000 available tools and guides.
Search all tools →